Improvement in plow-clevises



J. NEWHART.

Plow-Clevis.

No. 70,351. Patented Oct. 29, 1867.

' r 1 lm lenton AM.PHOT0-LITHO. CO. NM (OSBDRNE'S PROCESS) U ITED STATES PATENT OFFICE.

JACOB NEWHART, OF TERRE HAUTE, INDIANA.

IMPROVEMENT IN PLOW-CLEVISES.

Specification forming part of Letters Patent No. 70,351, dated October 29, 1867.

To all whom it may concern:

Be it known that I, JACOB NEWHART, of Terre Haute, Vigo county, Indiana, have invented certain new and useful Improvements in Plows; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification.

My improvement relates to that part of plows called clevis, so arranged as to regulate the pitch of the plows and depth of the furrow; and my invention consists chiefly in provisions for the easy regulation of the pitch and furrow, by means of a vertical oscillating clevis attached with a pivot to the fore'end of the plow-beam.

Figure 1 represents, in perspective, the clevis oscillated to different positions, as shown by full line and dotted line. Fig. 2 represents, in perspective, a general outline of a plow provided with my clevis. Fig. 3 represents a section of the plow-beam and bolt se curing the clevis in its desired position. Fig. 4 represents a section of the plow-beam and bolt loosened to oscillate the clevis or change its position.

My improvement consists chiefly in a wrought-iron clevis of a U-shaped form, having one arm about one time as long as the other, this longest arm being provided with a circular segment T-head, marked A, Figs. 1 and 2, perforated with a series of united loops, B, to secure the clevis in its desired positions by the head of the regulating-bolt G. The clevisis secured to the plow-beam by the pivot screw-bolt D, Figs. 3 and 4, inserted horizontally through both arms of the clevis. The regulating-bolt 0, Figs. 1, 3, and 4, laid horizontally in the plow-beam, has a screw-thread running in a nut, letter R, sunk in the plowbeam to afford lateral motion, when needed, to secure or change the position of the clevis; and the bolt 0 is further provided with circular head F, making close fit to each loophole, and thereby securing it firmly in position when turned down, or relieving it when looscned to allow of the oscillating of the clevis. The regulating-bolt G is further provided with a lever-handle H, to enable the easy turning of the bolt.

I claim herein as new and of my invention- 1. The oscillating plow-clevis, Figs. 1 and 2, in the manner set forth.

2. The regulating-bolt O, in connection with the looped T-segment, Figs. 1, 2, 3,. and 4, substantially as set forth and herein explained.

JACOB NEWHART.

Witnesses:

I J. A. VRYDAGH, GUNTnnR WEISS. 

